BlogJava-向前走的螃蟹-随笔分类-Struts1.x

JFreeChart自我总结

向前走的螃蟹 — Wed, 31 Mar 2010 03:31:00 GMT

摘要: 1、饼图、柱状图、折线图生成的工具类 1 package com.text.util; 2 3 import java.awt.BasicStroke; 4 import java.awt.Color; &... 阅读全文

向前走的螃蟹 2010-03-31 11:31 发表评论

struts类型转换

向前走的螃蟹 — Thu, 11 Jun 2009 07:03:00 GMT

struts类型转换：有两种方法(a)实现HttpServlet接口；(b)实现PlugIn接口；
converter_index.jsp(输入页面)

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP 'converter_index.jsp' starting pagetitle>
  head>
  <body>
    <form action="typeconvert.do" method="post">
    <table>
        <tr>
            <td>intValue:td><td><input type="text" name="intValue"/>td>
        tr>
        <tr>
            <td>doubleValue:td><td><input type="text" name="doubleValue"/>td>
        tr>
        <tr>
            <td>booleanValue:td><td><input type="text" name="booleanValue"/>td>
        tr>
        <tr>
            <td>sqlValue:td><td><input type="text" name="sqlValue"/>td>
        tr>
        <tr>
            <td>utilDateValue:td><td><input type="text" name="utilDateValue"/>td>
        tr>
        <tr>
            <td>submit:td><td><input type="submit" name="submit"/>td>
        tr>
    table>
    form>
  body>
html>

converter_success.jsp(用于显示)

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.eplugger.struts.form.TypeConvertActionForm" %>
<%@ page isELIgnored="false" %>
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP 'converter_success.jsp' starting pagetitle>
  head>
  <body>
        EL表达式取值：<br>
      intValue:${typeConvertForm.intValue }<br>
      doubleValue:${typeConvertForm.doubleValue }<br>
      booleanValue:${typeConvertForm.booleanValue }<br>
      java.sql.DateValue:${typeConvertForm.sqlValue }<br>
      java.util.DateValue:${typeConvertForm.utilDateValue }<br>
      jsp取值：<br>
      <%
      TypeConvertActionForm tcaf =(TypeConvertActionForm) request.getAttribute("typeConvertForm");
      %>
      <%
          out.print(tcaf.getIntValue());
      %><br>
      <%
          out.print(tcaf.getDoubleValue());
      %><br>
      <%
          out.print(tcaf.getBooleanValue());
      %><br>
      <%
          out.print(tcaf.getSqlValue());
      %><br>
       <%
          out.print(tcaf.getUtilDateValue());
      %><br>
  body>
html>

TypeConverterAction.java(只作跳转)

package com.eplugger.struts.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class TypeConvertAction extends Action {
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        return mapping.findForward("success");
    }
}

TypeConverterActionForm.java（接收页面传来的值）

package com.eplugger.struts.form;

import org.apache.struts.action.ActionForm;

public class TypeConvertActionForm extends ActionForm {
    private int intValue;
    private double doubleValue;
    private boolean booleanValue;
    private java.sql.Date sqlValue;
    private java.util.Date utilDateValue;

    public int getIntValue() {
        return intValue;
    }
    public void setIntValue(int intValue) {
        this.intValue = intValue;
    }
    public double getDoubleValue() {
        return doubleValue;
    }
    public void setDoubleValue(double doubleValue) {
        this.doubleValue = doubleValue;
    }
    public boolean getBooleanValue() {
        return booleanValue;
    }
    public void setBooleanValue(boolean booleanValue) {
        this.booleanValue = booleanValue;
    }
    public java.sql.Date getSqlValue() {
        return sqlValue;
    }
    public void setSqlValue(java.sql.Date sqlValue) {
        this.sqlValue = sqlValue;
    }
    public java.util.Date getUtilDateValue() {
        return utilDateValue;
    }
    public void setUtilDateValue(java.util.Date utilDateValue) {
        this.utilDateValue = utilDateValue;
    }
}

UtilDateConverter.java（对传来的String类型的数据进行转换）

package com.eplugger.struts;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.commons.beanutils.Converter;

public class UtilDateConverter implements Converter {

    public Object convert(Class type, Object value) {
        System.out.println("value="+value);
        if(value==null){
            return value;
        }
        Date date=null;
        if(value instanceof String){
            SimpleDateFormat sdf = new SimpleDateFormat("yyy-mm-dd");
            try{
                date = sdf.parse((String)value);
            }catch(ParseException e){
                e.printStackTrace();
            }
        }
        return date;
    }
}

两种方法上面的都一样。下面的就是两种方法的区别了
下面如果用HttpServlet代码如下：
UtilDateConverterInitWithServlet.java

package com.eplugger.struts.converter;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import org.apache.commons.beanutils.ConvertUtils;
import com.eplugger.struts.UtilDateConverter;
/**
* 注册java.util.date转换器
*/
public class UtilDateConverterInitWithServlet extends HttpServlet {
    @Override
    public void init() throws ServletException {
        ConvertUtils.register(new UtilDateConverter(), Date.class);
    }

}

用这个方法必须在web.xml中加上配置

    <servlet>
        <servlet-name>UtilDateConverterInitWithServletservlet-name>
        <servlet-class>com.eplugger.struts.converter.UtilDateConverterInitWithServletservlet-class>
        <load-on-startup>3load-on-startup>
    servlet>

如果用PlugIn方法代码：

package com.eplugger.struts.converter;
import java.util.Date;
import javax.servlet.ServletException;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.action.PlugIn;
import org.apache.struts.config.ModuleConfig;
import com.eplugger.struts.UtilDateConverter;

public class UtilDateConverterInitWithPlugIn implements PlugIn {
    public void destroy() {
    }
    public void init(ActionServlet servlet, ModuleConfig config)
            throws ServletException {
        ConvertUtils.register(new UtilDateConverter(), Date.class);
    }
}

Struts-config.xml(如果用PlugIn方法必须在最后加上)

xml version="1.0" encoding="gb2312"?>
DOCTYPE struts-config PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
        "http://struts.apache.org/dtds/struts-config_1_3.dtd">

<struts-config>
    <form-beans>
        <form-bean name="fileupload" type="com.eplugger.struts.form.FileUploadActionForm"/>
        <form-bean name="blankfield" type="com.eplugger.struts.form.BlankFieldActionForm"/>
        <form-bean name="typeConvertForm" type="com.eplugger.struts.form.TypeConvertActionForm"/>
    form-beans>

    <action-mappings>

        <action path="/typeconvert"
                type="com.eplugger.struts.action.TypeConvertAction"
                name="typeConvertForm"
                scope="request"
        >
            <forward name="success" path="/converter_success.jsp"/>
        action>
    action-mappings>
    <plug-in className="com.eplugger.struts.converter.UtilDateConverterInitWithPlugIn"/>
struts-config>

向前走的螃蟹 2009-06-11 15:03 发表评论

struts中空字符串EL表达式和jsp接受的效果

向前走的螃蟹 — Thu, 11 Jun 2009 02:12:00 GMT

在表单中没有input输入域，jsp脚本接收到的值为null，EL表达式接受到得值是空串；

如果表单中有input输入域但没有给值，jsp脚本和EL表达式接受的值都是空串；

向前走的螃蟹 2009-06-11 10:12 发表评论

struts文件上传（简单实例）

向前走的螃蟹 — Wed, 10 Jun 2009 13:57:00 GMT

struts文件上传主要的文件有：
2个jsp文件uploadIndex.jsp和uploadSuccess.jsp文件；FileUploadAction.java；FileUploadActionForm.java；struts-config.xml；web.xml；

1、uploadIndex.jsp 注意：form中method="post" ；enctype="multipart/form-data"

<%@ page language="java" pageEncoding="gb2312"%>
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>测试Strust文件上传title>
  head>
  <body>
      <form action="fileupload.do" method="post" enctype="multipart/form-data" >
          <table>
              标题：<input type="text" name="title"/>
              <input type="file" name="myfile"/>
              <input type="submit" value="上传"/>
          table>
    form>
  body>
html>

2、uploadSuccess.jsp

1 <%@ page language="java" pageEncoding="gb2312"%>
2 <%@ page isELIgnored="false" %>
3 DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
4 <html>
5   <head>
6     <title>uploadSuccess.jsptitle>
7   head>
8   <body>
9     文件标题：${fileupload.title }<br>
10     文件名：${fileupload.myfile.fileName }<br>
11     文件大小：${fileupload.myfile.fileSize}<br>
12   body>
13 html>
14

3、FileUploadActionForm.java

1 package com.eplugger.struts.form;
2 import org.apache.struts.action.ActionForm;
3 import org.apache.struts.upload.FormFile;
4 public class FileUploadActionForm extends ActionForm {
5     private String title;
6     private FormFile myfile;  //注意：上传文件的类型必须是FormFile；它是struts提供的；
7     public String getTitle() {
8         return title;
9     }
10     public void setTitle(String title) {
11         this.title = title;
12     }
13     public FormFile getMyfile() {
14         return myfile;
15     }
16     public void setMyfile(FormFile myfile) {
17         this.myfile = myfile;
18     }
19 }
20

4、FileUploadAction.java

package com.eplugger.struts.action;

import java.io.FileOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
import com.eplugger.struts.form.FileUploadActionForm;

public class FileUploadAction extends Action {
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        //获得form
        FileUploadActionForm fpaf =(FileUploadActionForm)form;
        //获得通过form传来的title值；
        String title = fpaf.getTitle();
        //获得通过form传来的文件；注意类型必须是FormFile；
        FormFile myFile = fpaf.getMyfile();
        if(myFile != null ){
            //创建文件输出的路径
            FileOutputStream fos= new  FileOutputStream("e:\\"+myFile.getFileName());
            //输出（一个bayt[]数组）
            fos.write(myFile.getFileData());
            //把内存中的文件变成物理的
            fos.flush();
            //关闭
            fos.close();
        }
        request.setAttribute("title","title");
        return mapping.findForward("success");
    }
}

5、struts-config.xml

6.web.xml

xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <welcome-file-list>
    <welcome-file>index.jspwelcome-file>
  welcome-file-list>

  <servlet>
        <servlet-name>actionservlet-name>
        <servlet-class>org.apache.struts.action.ActionServletservlet-class>

        <init-param>
            <param-name>configparam-name>
            <param-value>/WEB-INF/struts-config.xmlparam-value>
        init-param>
        <init-param>
            <param-name>debugparam-name>
            <param-value>2param-value>
        init-param>
        <init-param>
            <param-name>detailparam-name>
            <param-value>2param-value>
        init-param>
        <load-on-startup>2load-on-startup>
    servlet>

    <servlet-mapping>
        <servlet-name>actionservlet-name>
        <url-pattern>*.dourl-pattern>
    servlet-mapping>
web-app>

最后说一下，关于文件的大小等参数都可以再struts-config.xml文件中的中配置，可以配置的属性可以参考struts-core-1.3.10.jar中的org.apache.struts.resources.struts-config_1_3.dtd
主要内容如下：

向前走的螃蟹 2009-06-10 21:57 发表评论

struts中动态表单（DynaActionForm）的使用(超简单例子)

向前走的螃蟹 — Sun, 07 Jun 2009 09:16:00 GMT

主要功能是在页面上输入username和password提交，然后在另一个页面显示。
1.所需要的包就是struts的lib包；
2.所涉及道德文件有：web.xml；struts_config.xml；两个页面（index.jsp、dyna_actionform.jsp）；一个action(DynaAction.java)；
3.这种动态的DynaActionForm是将Form继续传递。违背了分层的规则（少用）；
web.xml 这个文件没什么的别的。

1xml version="1.0" encoding="UTF-8"?>
2<web-app version="2.5"
3    xmlns="http://java.sun.com/xml/ns/javaee"
4    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
6    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
7  <welcome-file-list>
8    <welcome-file>index.jspwelcome-file>
9  welcome-file-list>
10
11  <servlet>
12        <servlet-name>actionservlet-name>
13        <servlet-class>org.apache.struts.action.ActionServletservlet-class>
14
15        <init-param>
16            <param-name>configparam-name>
17            <param-value>/WEB-INF/struts-config.xmlparam-value>
18        init-param>
19        <init-param>
20            <param-name>debugparam-name>
21            <param-value>2param-value>
22        init-param>
23        <init-param>
24            <param-name>detailparam-name>
25            <param-value>2param-value>
26        init-param>
27        <load-on-startup>2load-on-startup>
28    servlet>
29
30    <servlet-mapping>
31        <servlet-name>actionservlet-name>
32        <url-pattern>*.dourl-pattern>
33    servlet-mapping>
34web-app>
35

struts_config.xml 动态的Form就是在这里配置的

1xml version="1.0" encoding="gb2312"?>
2DOCTYPE struts-config PUBLIC
3        "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
4        "http://struts.apache.org/dtds/struts-config_1_3.dtd">
5
6<struts-config>
7    <form-beans>
8        <form-bean name="dynaFrom" type="org.apache.struts.action.DynaActionForm">
9            <form-property name="username" type="java.lang.String"/>
10            <form-property name="age" type="java.lang.Integer"/>
11        form-bean>
12    form-beans>
13
14    <action-mappings>
15        <action path="/danaform"
16                type="com.eplugger.struts.action.DynaAction"
17                name="dynaFrom"
18                scope="request"
19        >
20            <forward name="success" path="/dyna_actionform.jsp"/>
21        action>
22    action-mappings>
23struts-config>
24

DynaAction.java注意这个文件

1 package com.eplugger.struts.action;
2
3 import javax.servlet.http.HttpServletRequest;
4 import javax.servlet.http.HttpServletResponse;
5
6 import org.apache.struts.action.Action;
7 import org.apache.struts.action.ActionForm;
8 import org.apache.struts.action.ActionForward;
9 import org.apache.struts.action.ActionMapping;
10 import org.apache.struts.action.DynaActionForm;
11
12 public class DynaAction extends Action {
13
14     @Override
15     public ActionForward execute(ActionMapping mapping, ActionForm form,
16             HttpServletRequest request, HttpServletResponse response)
17             throws Exception {
18         //获取动态的ActionForm
19         DynaActionForm daf = (DynaActionForm) form;
20         //DynaActionForm中提供了get()方法，所以我们可以直接获得页面传来的值。但是他把值放到了Map中，所以我们要强制类型转换
21         String username = (String)daf.get("username");
22         Integer age = (Integer)daf.get("age");
23         //成功转到成功页面
24         return mapping.findForward("success");
25     }
26
27 }
28

index.jsp

1 <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
2 DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
3 <html>
4   <head>
5   head>
6   <body>
7       <form action="danaform.do" method="post">
8       username:<input type="text" name="username"><br>
9       age:<input type="text" name="age"><br>
10       <input type="submit" value="submit">
11       form>
12   body>
13 html>
14

dyna_actionform.jsp

1<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
2    pageEncoding="ISO-8859-1"%>
3<%@ page isELIgnored="false" %>
4DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
5<html>
6<head>
7<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
8<title>Insert title heretitle>
9head>
10<body>
11    username:${dynaFrom.map.username }<br>
12    age:${dynaFrom.map.age }
13body>
14html>

最后说一点动态的ActionForm的验证，通常使用动态验证框架validator。否则将失去动态ActionForm的意义。

向前走的螃蟹 2009-06-07 17:16 发表评论